Add extra logging to debug issue

Author: ivoanjo

spec/datadog/profiling/crashtracker_spec.rb

@@ -9,7 +9,9 @@
     skip_if_profiling_not_supported(self)
 
     crash_tracker_pids = `pgrep -f libdatadog-crashtracking-receiver`
-    expect(crash_tracker_pids).to be_empty, "No crash tracker process should be running, found #{crash_tracker_pids}"
+    expect(crash_tracker_pids).to be_empty,
+      "No crash tracker process should be running, found #{crash_tracker_pids}" \
+            ", Failure details: ps aux: #{`ps aux`}"
   end
 
   let(:exporter_configuration) { [:agent, 'http://localhost:6006'] }